Ok I'm in the process of remaking my own 1966 and 1967 wiper motor units complete spindle to spindle and need a few bits to get dimensions etc . So any bits damaged bent etc. Don't need motors as sorted on that front . Also no spindles as have a good supply of those .
So mainly the bodies/ frames and the long rods. And the drivers would be good . I already do the 1955 to 1964 And some 65 model ones .

A modified spindle assembly for 1966/7 so that the smart pull out safari wiper dis-engagers (as available for early models) would be a desirable upgrade available for 1966/7 buses rather than the crude bolt on type currently only available as far as I am aware. Any chance do you think?

Sorry for delay , it is something I have thought about , but only way I can see it happening is replacing your wiper assembly with my pre 65 setup . But that's alot of bits to swap over . Once I have these 66 67 ones sorted I will see if there is a way to do it to these or not .